There is no Canadian automobile industry. The "Canadian" automobile industry is simply the U.S. automobile industry's outsourced factories. That being the case, the idea of protectionism is entirely pointless, but...

This question is despicable. It starts with false assumptions. 1. Whether wages are actually set to the marginal productivity of labor varies greatly from economy to economy: http://lanekenworthy.net/2010/11/17/when-is-economic-growth-good-for-the...